Widjanarko, Nicolas Daniel, et al. “Effects of Combination of Curcumin and Piperine Supplementation on Glycemic Profile in Patients With Prediabetes and Type 2 Diabetes Mellitus: A Systematic Review and Meta-Analysis”. Journal of the ASEAN Federation of Endocrine Societies, vol. 39, no. 1, Feb. 2024, pp. 106-14, doi:10.15605/jafes.039.01.18.